Terence sparham



UNITED v STATES PATENT OFFICE.

TERENCE SPARIIAM, OF BROOKVILLE, ASSIGNOR OF ONE-HALF TO HENRY C.MITCHELL AND JOHN E. HULETT, OF TORONTO, CANADA.

BOILER-COVERING.

SPECIFICATION forming part of Letters Patent No. 512,524, dated January9, 1894.

Application filed April 14,1893. fierial No. 470,367- (No specimens.)

To a. whom it may concern:

Be it known that I, TERENCE SPARHAM, a subject of the Queen of GreatBritain, residing at Brockville, in the Province of Ontario,

Dominion of Canada, have invented certain new and useful Improvements inBoiler-Coverings, of which the following is a specification, referencebeing had therein to the accompanying drawing.

to This invention has relation to a composition of matter intended foruse as a covering for steam boilers and all other structures intendedfor the production, distribution and application of heat, the objectbeing to prevent radiation and loss of heat. Among the ends in view arethe production of a non-conducting substance which shall be cheap,comparatively light, porous, that is, interiorly disposed into numerouscells which will constitute Within the composition multitudinousdead-air spaces or vacuums more or less perfect. These cells arenon-communicating and tend to reduce the weight of the composition as awhole, so that radiation and loss of heat 2 5 are prevented without theaddition and undue weight of material to a structure.

Other objects and advantages of the invention will appear in thefollowing description and the novel features will be particularly setforth in the claims.

For the body of my composition I use mica and soap-stone each in a moreor less finelypowdered condition and I thereby secure the Well-knownadvantage common to each in 3 5 that each is materially unaifected byordinarily high temperature especially by such high degrees thereof aswill naturally exist in steam-producing and heating apparatuses. Iemploy as a binder, molasses. As it requires approximately 400Fahrenheit to burn sugar or the saccharine principle of molasses, itwill serve as a binder for all structures intended for the production orapplication of heat below that temperature. I employ bi-carbonate ofsoda for the production of the cellular structure which lightens themass at the same time.

I do not limit my invention to any particular proportion of each of theingredients as the same may bemodified to produce variable effects fordifferent or specific purposes but as a standard formula for producing acovering for ordinary structures used under ordiprotector to thecomposition.

nary circumstances and conditions I find the following proportions to beeminently satis- 5 5 factory: mica two parts, soap-stone two parts,molasses one part, bi-carbonate of soda oneone-hundredth part. As abovestated, however, these proportions may be varied as desired for specialpurposes, conditions of use and the degree of temperature to which thesubstance is to be subjected.

The composition is prepared in the following manner: I boil watersufiicient in quantity to give the composition a mortar-likeconsistency, for one half hour, the molasses and soda being mixedtherewith and while hot I add the mica and the soap-stone. Thecomposition when properly fixed having the consistency of mortar can beapplied to a structure by means of a jacket arranged about and at adistance from the structure to form a surrounding space into which thecomposition may be poured. A covering of wire cloth may if desired, befirst placed within the 7 5 jacket and will serve to hold thecomposition in place until it is hardened by the application of heat andsaid jacket may remain as a An outer covering of any water proofmaterial may be ap- 8o plied for example, acomposition of mica,soap-stone and coal-tar which would give a water-proof and enameled orfinished exterior. A coat of ordinary paint may be used as an exteriorfinish but the composition itself will not require an exterior coatingexcept where it is exposed to excessive moisture.

What I claim is- 1. A heat non-conducting composition consisting ofmica, soap-stone, molasses and bi- 9o carbonate of soda, substantiallyas and for the purpose set forth.

TERENCE SPARHAM.

Witnesses:

L. O. HILLS, HEATH SUTHERLAND.

